Radial-drilling machine



(N0 Model.) 2 Sheets-Sheet 1.

' W. D. McNAULL.

RADIAL DRILLING MACHINE. No. 472,546., Patented Apr. 12, 1892,

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RADIAL DRILLING MACHINE. I No. 472,546. Patented Apr. 12, 1892.

UNITED STATES PATENT FFEQE.

WILLIAM D. MONAULL, OF RONOEVERTE, WVES'I VIRGINIA.

RADIAL-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 472,546, dated April12, 1892.

Application filed June 2'7, 1891. Serial No. 397,734. (No model.) I

To all whom it may concern.-

Be it known that 1, WILLIAM D. MCNAULL, residing atRonceverte, in thecountyof Greenbrier and State of West Virginia, have invented certainnew and useful Improvements in Radial-Drilling Machines, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to drilling-machines.

The object of the invention is to produce a drilling-machine in whichthe drill may be adjusted to bore at an incline and may be advanced withits support from the main standard and be quickly adjusted and firmlyheld in working position.

Figure 1 is a broken vertical section of so much of a drilling-machineas is necessary to illustrate my invention. Fig. 2 is a broken elevationand partial section of the upper part of the frame or standard and thedrillhead. Fig. 3 is an enlarged front elevation of the face-plate orbracket.

The numeral 1 denotes the base of a drilling-machine or, as commonlycalled, metalboring drill.

2 denotes an upright standard which supports a bracket or arm 3, onwhich the bed or boring-table 4 is supported. The bracket and bed arepreferably vertically adjustable on the standard by any suitable means,as by rack 5 and pinion 6. The arm 7 passes through a mortise 17 'in thestandard 2, so as to have its face-plate 8 above the bed 4, and theplate 8 is preferablyadisk, which may have curved slots 9 9 therein. 7

The drill-head 10 has a plate 11, which fits against the plate 8 and ispreferably countersunk to receive said plate. The plate 11 may be turnedon the plate 8 and secured in any adjusted position by bolts passingthrough holes in said plate 11 and through the slot 9 in plate 8, thebolts having nuts 13.

The edge of the plate 11 is preferably graduated, so that the head maybe readily adjusted to any angle and the angle indicated. It is manifestthat the position of the slots and bolts is not important, and any othersuitable clamping mechanism'by which the drill-head plate may be heldwhen adjusted 011 the bracket will answer the purpose of the slots andbolts and nuts; also that it is immaterial which of the plates 8 and 11embraces the other. By inclosing a disk face-plate on one member in arecessin the other member, however, the strains are taken off from thefastening devices, as it would not be if two faceplates were simplyclamped together face to face, as is common.

An arm or guide 15 projects radially from the swivel-plate 11 and may beintegral therewith or firmly secured thereto. The guidearm 15 can thusbe adjusted to various angles in a circular plane, the center of whichis the center of plate 8.

The driving-shaft extends lengthwise through the hollow arm 7. Shaft 20may be driven by means of a bevel-gear 21, engaging a bevel-gear on acounter-shaft supported on standard 2, arm 7 being slotted to admit theengagement of such driving-gear, or the'shaft 20 may be driven by othersuitable driving means. 7 I

The arm 7 is adjustable through the mortise 17, as by means of rack 23on the arm, and pinion 24:, supported on the standard and engaging saidrack on arm, or the arm may be adjusted with screw and hand wheel orcrank.

p The arm 7 is held from rotation in the mortise in the machineillustrated by the rack 23, fitting closely in a slot or recess at oneside of the mortise 17.

Shaft 20 passes through the face-plates 8 and 11 and has a bearing 80,attached to the plate 8 and preferably extending through a hole in theplate 11. A bevel-gear on the gear 31 on the drill-shaft or boring-bar.

A bracket 25 extends from the lower end of arm 15 and is perforated toform a guideway for the drill-rod sleeve 33. Abracket 27 extends fromthe upper end of plate 11 and forms a bearing from the hub 32 orbevelgear 31 in line with the guide-bracket 25.

The drill-rod or boringshaft 35 passes through the sleeve 33 and thedriving-gear 31 and is splined or otherwise constructed in usual mannerto be free to move lengthwise through the. driving-gear, but to turnwith the gear. Thus the rotation of shaft 20 causes the drill-shaft torotate at Whatever angle it may be held by the brackets 25 and 27.

The face-plate 11 and arm 15 form the drillcarrier, and also carrysupporting-brackets end of. said shaft is in position to engage a 28 and29, in which the counter-shaft 40 has its bearings, said shaft extendingparallel with the drill-rod, or nearly so. The shaft 40 hasdriving-pulleys ll attached thereto and the drill-rod or gear 31 carriesa corresponding set of pulleys 36, which pulleys rotate with thedrill-rod. Thus by belting from pulley 36 to pulley 41 the counter-shaft40 may be driven.

iSihaft 40 has a bevel-gear42,-which engages a similar gear 43 on atransverse worm-shaft t-l. Said shaft 44: is supported in suitablebearings near the lower end of bar 15. A worm t6 on shaft M engages aworm-gear 4-7 on shaft 48, which shaft extends in proximity to thesleeve Shaft 48 carries a pinion 49, which engages a rack 50, fixed toone side of sleeve By this train of gearing the sleeve can be caused toraise or lower the drill-rod 35 and feed the drill to its work or raiseit from the same, the drill-rod being free to turn in the sleeve 33, butmade to move lengthwise with said sleeve by a collar or similarengagement, as usual in machines of this class.

The shaft 18 and pinion 49 can be thrown out of engagement byaclutch 51,so that the worm l6 will not drive pinion 4:9), and thus stop thefeeding of the drill. By hand wheel or lever Set 011 the end of shaft T8the drillshaft may be moved independently of the wornrgear when saidgear is out of engagement.

It is apparentthat the location of the clutch is not material. It can beat any convenient place to throw the train of feeding-gears into or outof operation.

The shaft 44 and worm 46 may be actuated by the hand-wheel 52 to feedthe drill-sleeve forward.

Numerous modifications in the construction will suggest themselves. Theimportant feature of the invention is the radial adjustment of thedrill-bar and its guiding and feeding mechanism without interfering withthe driving connection between the drill-rod and the main driving-shaft.

What I claim is- 1. In adrillirig-machine, a vertical standard having atransverse mortise and a drivingshaft carried by said standard, anextensible transverse non-rotatable bracket or arm pass ing through saidmortise,a drill-carrier radially adjustable on said arm, and adrivingshaft carried by the extensible arm and having gears engaging thedriving-gear of the main standard and the driving-gear of thedrill-spindle in all positions of the bracket or arm, all combinedsubstantially as described.

2. In a drilling-machine, the combination of the vertical standardhaving a transverse mortise near the top, a driving-shaft, theextensible non-rotatable hollow arm passing through the mortise andhaving a radially-adjustable drill-carrier at its outer end, the shaftin said arm having gears engaging the drilldriving gears and a gear onthe main shaft in all positions of the arm, and a rack on said armengaging a pinion carried by the main standard, whereby the arm may beextended or withdrawn and the driving-gear maintained in constantengagement, substantially as described.

3. The combination, with the standard havingatransversemortiseandadriving-shaft, an extensiblenon-rotatable arm passingthroughsaid mortise, a faceplate at the outer end of said arm, a drill-carrierradially adjustable on said faceplate, a driving-shaft extending throughand adjustable with the extensible arm, and gears on said shaft engaginggears 011 the main driving-shaft and on the drillearrier, substantiallyas described.

4-. The standard and extensible non-rotatable arm having a circularface-plate, the drillcarrier having a circular recess to receive saidfaee-plate, clamping mechanism to retain said drill-carrier in radialadjustment on the arm, and the driving shafts and gears carried by thearm and drill-carrier, all in combination substantially as described.

5. The eombinatiomwith the uprightstandard having a transx'erse mortise,the extensible non-rotatable arm passing through said mortise, thecircular face-plate at' the end of said arm, the drill-carrier having arecess which receives said face-plate, and clampingbolts passing throughthe carrier and through slots in the face-plate, all substantially asdescribed.

In testimony whereof I atlix my signature in presence of two witnesses.

VILLIAM l). MUNAULIJ.

\Vitnesses:

1). W. RUNNEALs, Quin MORTON.

